2x8 QPSK Mixer
To be used for optical coherent detection such as DP-QPSK receivers, Optoplex’s ten-port 2x8 Coherent Mixer (aka QPSK mixer) combines the incoming signal with a local oscillator to generate eight light states in the complex-field space. The eight light output signals can then be coupled into four pairs of balanced detectors. The block diagram below shows the application of a 2x8 coherent mixer in a DP-QPSK receiver. Since the mixing process is data rate independent, the devices can be used for any data rate in applications such as 40Gb/s or 100Gb/s transmission systems.
Optoplex’s 2x8 Coherent Mixer is free-space micro-optics-based and patent pending. The device exhibits highly athermal behavior in terms of insertion loss and phase error. When the output signals are detected by four pairs of balanced receivers, both the amplitudes and the relative phase information of the input signal can be extracted for signal amplification and cost-effective compensation of optical transmission impairments, such as dispersion and PMD, in the electronic domain.
Key Features and Benefits
· Purely passive (no temperature control)
· Compact size
· Low insertion loss
· Low phase error
· <1 ps skew
· Colorless (wavelength independent)
· Data-rate independent
Applications
· Optical coherent detection
· DP-QPSK demodulation
· Transmission at 100Gb/s (preferred choice of modulation format)
Specifications
Parameter
Unit
Specification
Wavelength Range (C-Band)
nm
1527 ~ 1567
Phase Difference1 (between Sk+Lk and Sk+jLk, between
Sk-Lk and Sk+jLk; k=x or y)
deg
90 ± 7
IL1 (withconnectors)
S (polarization scrambled) à All Outputs
L (45° linear polarized) à All Outputs
dB
dB
9.5 ~ 11
9.5 ~ 11
IL Uniformity1
S to any outputs; L to any outputs
Among All Others
dB
dB
<0.7
<1.0
Optical Return Loss
dB
>27
Optical Path Difference1 (Skew, among Sà All Outputs)
ps
<1
Optical Path Difference1 (Skew, among Là All Outputs)
ps
<1
Polarization extinction ratio1 (for either S or L)
dB
>18
Max. Input Optical Power
mW
300
Operating Temperature
°C
0 ~ 65
Storage Temperature
°C
-40 ~ 85
Dimension (L x W x H)2
mm
48 x 31 x 13
Fiber Type (for S, and All Outputs)
-
SMF-28 with 900um tight buffer
Fiber Type (for L)
-
PM with 900um loose tube
Fiber Pigtail Length
m
1.0 ± 0.1
Connector Type
-
TBD
Notes: 1. Over the stated spectral and operating temperature ranges and all polarization states. 2. Excluding ten collimator sleeves extending from one longer side.
商品属性 [波长] 1527 ~ 1567nm [功率] 300mW